import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login'
import Home from '../components/Home'
import Welcome from '../components/Welcome'
import Users from '../components/user/Users'
import Rights from '../components/power/Rights'
import Roles from '../components/power/Roles'
import Cate from '../components/goods/Cate'
import Params from '../components/goods/Params'
import List from '../components/goods/List'
import Add from '../components/goods/Add'
import Order from '../components/order/Order'
import Report from '../components/report/Report'

Vue.use(VueRouter)

const router = new VueRouter({
    routes: [
        { path: '/', redirect: '/login' },
        { path: '/login', component: Login },
        {
            path: '/home',
            component: Home,
            redirect: '/welcome',
            children: [
                { path: '/welcome', component: Welcome },
                { path: '/users', component: Users },
                { path: '/rights', component: Rights },
                { path: '/roles', component: Roles },
                { path: '/categories', component: Cate },
                { path: '/params', component: Params },
                { path: '/goods', component: List },
                { path: '/goods/add', component: Add },
                { path: '/orders', component: Order },
                { path: '/reports', component: Report }
            ]
        }
    ]
})

//全局前置守卫：初始化时执行、每次路由切换前执行
router.beforeEach((to, from, next) => {
    if (to.path === '/login') return next()

    const tokenStr = window.sessionStorage.getItem('token')

    if (!tokenStr) return next('/login')

    next()
})

//全局后置守卫：初始化时执行、每次路由切换后执行
router.afterEach((to, from) => {
    if (to.meta.title) {
        document.title = to.meta.title //修改网页的title
    } else {
        document.title = 'vue_shop'
    }
})

export default router